| Special tools and workshop equipment required |
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| Test box -V.A.G 1598/47- |
| 20-pin plug connection -A- |
| 1 - | Sunlight penetration photosensor 2 -G134- or Sunlight penetration photosensor -G107-, signal |
| 2 - | High-pressure sender -G65- |
| 3 - | Sunlight penetration photosensor 2 -G134- or Sunlight penetration photosensor -G107-, signal |
| 4 - | As of CW 22.09: air quality sensor -G238- |
| 5 - | CAN bus High (comfort) |
| 6 - | CAN bus Low (comfort) |
| 9 - | + 5V for sunlight penetration photosensor 2 -G134- or sunlight penetration photosensor -G107- |
| 10 - | Left seat heating (optional) |
| 11 - | Right seat heating (optional) |
| 12 - | Up to MY 08: terminal 75A, no longer applicable as of MY 09 |
| 13 - | Left vent temperature sender -G150- |
| 14 - | Right vent temperature sender -G151- |
| 16 - | Up to MY 08: terminal 30A, no longer applicable as of MY 09 |
| 18 - | Regulating valve for compressor of air conditioning system -N280- |
| 20 - | Up to MY 08: terminal 15A, no longer applicable as of MY 09: terminal 30A |
| 16-pin plug connection -B- |
| 1 - | + 5V for control motors |
| 2 - | Potentiometer for left temperature flap control motor -G220- |
| 3 - | Potentiometer for right temperature flap control motor -G221- |
| 4 - | Potentiometer for defroster flap control motor -G135- |
| 5 - | Potentiometer for central flap control motor -G112- |
| 6 - | Potentiometer for re-circulating air flap control motor -G143- (no longer applicable as of 05.07) |
| 7 - | Potentiometer for air flow flap control motor -G113- (no longer applicable as of 05.07) |
| 8 - | Left footwell vent temperature sender -G261- |
| 9 - | Right footwell vent temperature sender -G262- |
| 10 - | Fresh air intake duct temperature sensor -G89- (no longer applicable as of 05.05) |
| 11 - | Evaporator vent temperature sender -G263- |
| 14 - | Signal ground potentiometer |
| 16-pin plug connection -C- |
| 1 - | Left temperature flap control motor -V158- |
| 2 - | Left temperature flap control motor -V158- |
| 3 - | Defroster flap control motor -V107- |
| 4 - | Defroster flap control motor -V107- |
| 5 - | Central flap control motor -V70-, person flow |
| 6 - | Central flap control motor -V70-, footwell |
| 7 - | Re-circulating air flap control motor -V113-, re-circulating air actuation |
| 8 - | Re-circulating air flap control motor -V113-, fresh air actuation |
| 9 - | Air flow flap control motor -V71- |
| 10 - | Air flow flap control motor -V71- |
| 11 - | Right temperature flap control motor -V159- |
| 12 - | Right temperature flap control motor -V159- |
| 15 - | Fresh air blower -V2- |
| 16 - | Fresh air blower - V2-, signal |
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